In the field of computer securitysecurity, the CTF (Capture the Flag) is aCapture the Flag) is a competition organized as acompetition organized in the form of achallenges where the objective is to findto find and/or exploit computervulnerabilities affecting software, websites orsoftware, websites or computer systemsor computer systems in order to get in andto get in and get a flag(flag in French), proof of theof the player's success.

The Midnight Flag CTF is the annual cybersecurity competition organized by ESNA students.